[dpdk-dev] "TX WTHRESH must be set to 0 if tx_rs_thresh is greater than 1"
Which DPDK version are you using
marc
On 19/10/14 00:50, Matthew Hall wrote:
> Hello,
>
> I'm just trying to understand what you're supposed to do about this error to
> get the optiomal configuration / performance. The error message and comments
> seem like they're designed for Intel ethernet driver hackers not security
> hackers like myself! ;-)
>
> Note: I'm trying out the Intel 82545EM in VirtualBox because the virtio-net
> approach didn't work, for reasons I enumerated in some previous mails.
>
> /*
> * If rs_bit_thresh is greater than 1, then TX WTHRESH should be
> * set to 0. If WTHRESH is greater than zero, the RS bit is ignored
> * by the NIC and all descriptors are written back after the NIC
> * accumulates WTHRESH descriptors.
> */
> if (tx_conf->tx_thresh.wthresh != 0 && tx_rs_thresh != 1) {
> RTE_LOG(ERR, PMD, "TX WTHRESH must be set to 0 if "
> "tx_rs_thresh is greater than 1. (tx_rs_thresh=%u "
> "port=%d queue=%d)\n", (unsigned int)tx_rs_thresh,
> (int)dev->data->port_id, (int)queue_idx);
> return -(EINVAL);
> }
>
> Thanks,
> Matthew.
[dpdk-dev] "TX WTHRESH must be set to 0 if tx_rs_thresh is greater than 1"
1.7.1 with a few minor clang compatibility patches in the example apps
--
Sent from my mobile device.
On October 19, 2014 6:46:27 AM PDT, Marc Sune wrote:
>Which DPDK version are you using
>
>marc
>
>On 19/10/14 00:50, Matthew Hall wrote:
>> Hello,
>>
>> I'm just trying to understand what you're supposed to do about this
>error to
>> get the optiomal configuration / performance. The error message and
>comments
>> seem like they're designed for Intel ethernet driver hackers not
>security
>> hackers like myself! ;-)
>>
>> Note: I'm trying out the Intel 82545EM in VirtualBox because the
>virtio-net
>> approach didn't work, for reasons I enumerated in some previous
>mails.
>>
>> /*
>> * If rs_bit_thresh is greater than 1, then TX WTHRESH should be
>> * set to 0. If WTHRESH is greater than zero, the RS bit is
>ignored
>> * by the NIC and all descriptors are written back after the NIC
>> * accumulates WTHRESH descriptors.
>> */
>> if (tx_conf->tx_thresh.wthresh != 0 && tx_rs_thresh != 1) {
>> RTE_LOG(ERR, PMD, "TX WTHRESH must be set to 0 if "
>> "tx_rs_thresh is greater than 1. (tx_rs_thresh=%u "
>> "port=%d queue=%d)\n", (unsigned int)tx_rs_thresh,
>> (int)dev->data->port_id, (int)queue_idx);
>> return -(EINVAL);
>> }
>>
>> Thanks,
>> Matthew.
